Table 1.

Histopathological grading scores

Scores	Microscopic findings
0	Normal histological findings
1	Mucosa: villus blunting, loss of crypt architecture, sparse inflammatory cell infiltration, vacuolization and edema. Normal muscular layer
2	Mucosa: villus blunting with fattened and vacuolated cells, crypt necrosis, intense inflammatory cell infiltration, vacuolization and edema Normal muscular layer
3	Mucosa: villus blunting with fattened and vacuolated cells, crypt necrosis, intense inflammatory cell infiltration, vacuolization and edema Muscular: edema, vacuolization, sparse neutrophil infiltration